What is optical transmission?

Video, audio and control signals are generally transmitted through an electric wire made of copper.
In contrast, a method for sending these signals as optical signals and converting them back into electric signals on the receiver side is generally called "optical transmission" or "optical communication."

The optical signals are transmitted through optical fiber. Conversion from electricity into light is called "E/O conversion," and conversion from light back into electricity is called "O/E conversion."

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